Quote:
Originally Posted by underscore
^ rapidshare?
also: true or false, once you have switched to synthetic oil you cannot go back to conventional, as it has changed the seals in some way.
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I'll let Mobil1 answer it for you:
But short answer, totally false. Conventional and Syn Oils are completely mixable and compatible, as long as they are API certified. Just look at all the synthetic blend oils there are, which are a mixture of both.